CN2854598Y - Sample injection syringe of titration device - Google Patents
Sample injection syringe of titration device Download PDFInfo
- Publication number
- CN2854598Y CN2854598Y CN 200520077911 CN200520077911U CN2854598Y CN 2854598 Y CN2854598 Y CN 2854598Y CN 200520077911 CN200520077911 CN 200520077911 CN 200520077911 U CN200520077911 U CN 200520077911U CN 2854598 Y CN2854598 Y CN 2854598Y
- Authority
- CN
- China
- Prior art keywords
- glass tube
- piston
- rubber ring
- periphery
- titration apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004448 titration Methods 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 title abstract 2
- 239000007924 injection Substances 0.000 title abstract 2
- 239000011521 glass Substances 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 13
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000840 electrochemical analysis Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000012086 standard solution Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
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- Sampling And Sample Adjustment (AREA)
Abstract
A sample injection injector of a titration device belongs to an important part of an electrochemical analysis instrument. An annular groove is formed in the outer circular surface of the front end of the syringe glass tube, an O-shaped rubber ring is arranged in the annular groove, and a connecting sleeve and a locking cap which are connected with the delivery tube are tightly pressed on the rubber ring; the end face of the injector piston is a smooth curved surface with the center 0.5-1.0 mm higher than the periphery, 2-4 convex rings are arranged on the side face of the piston, and the convex rings are in interference fit with the inner wall of the glass tube. The utility model is used for the dropping of the standard solution in the dropping method test in the electrochemical analysis, has firm interface, does not generate the phenomena of dropping and liquid leakage, and is convenient for processing and maintenance; meanwhile, when the piston is pushed, bubbles are avoided, leakage can be prevented, movement resistance is reduced, and the using effect is good.
Description
Technical field
The utility model relates to a kind of sampling injector of electrochemical analysis titration apparatus, particularly titration apparatus.
Background technology
In the electrochemical analysis field, titrimetry is to use the standard solution titration detected solution, makes that two kinds of solution neutralize, precipitation, redox or complex reaction.When being titrated to terminal point, have special reaction, lead sudden change with solution temperature or the like as electrode potential, electricity.The consumption of titrant during according to the concentration of titrant and terminal point can be obtained the concentration of detected solution.Therefore, no matter be the titration of which kind of form, all titration apparatus to be arranged, all need a sampling injector simple and reliable, easy to maintenance.
Usually, sampling injector glass tube in the titration apparatus and delivery line adopt taper fit, in use produce leakage unavoidably, the interface locking cap adopts the form (seeing accompanying drawing 2) that is threaded, though avoided interface to come off, the problem of leakage, but also brought the difficulty of processing of glass tube big, the problem that manufacturing cost rises.Also have a kind of sample introduction glass tube to adopt end boss structure (seeing accompanying drawing 3), its drawback is to put the interface locking cap in advance, just can finish whole operation processing then, gives to produce and safeguards, repairs to change and bring very big inconvenience.Moreover glass tube is to process under hot conditions, unavoidably the interface locking cap of being made by plastic material is caused the temperature injury.In addition, the piston crown end face of existing sampling injector is the plane, easily produces bubble, and the whole face of cylinder of piston side contact with the glass tube inwall, and having cooperated tight can resistance, has cooperated meeting generation seepage loose.
The utility model content
The technical problems to be solved in the utility model provides a kind of handling ease, titration apparatus sampling injector that result of use is good, easy to maintenance.
The technical solution of the utility model is: the titration apparatus sampling injector, comprise glass tube, piston, delivery line and joint, adapter sleeve, pin cap, improvements are on the described glass tube front end periphery ring groove to be arranged, establish rubber ring in the ring groove, and this rubber ring is in locking cap between step surface and the adapter sleeve end face, described piston end surface is the smooth surface that the center is higher than periphery, and there are 2～4 road bulge loops the piston side, this bulge loop and glass tube inwall interference fit.
Further technical scheme is: described ring groove cross section is a U-shaped, establishes O type rubber ring in the groove; Described piston end surface culminating point is than the high 0.5～1.0mm of periphery; Described piston material is a teflon, and its side bulge loop and the glass tube inwall magnitude of interference are 0.04～0.08mm.
Adopt above technical scheme, on sample introduction glass tube front end periphery, be processed into the ring-type U-lag, earlier locking cap is pushed from the glass tube front end during assembling, again O type rubber ring is inserted in the U-lag, then adapter sleeve is screwed in locking cap, make rubber ring compress outer rising, the connecting portion leakage that can not get loose, this structure handling ease, mounting or dismounting are convenient, use reliable.The piston crown end face is the smooth surface that the center is higher than periphery, and practice shows that when the pushing titration solvent can avoid producing bubble, there is bulge loop the piston side, with the glass tube inwall certain magnitude of interference is arranged, and has both prevented seepage, reduces the resistance of motion again, improves result of use.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is existing sampling injector interface screw connection structure synoptic diagram;
Fig. 3 is existing sampling injector interface boss syndeton synoptic diagram;
Fig. 4 is the utility model piston structure synoptic diagram (amplification).
Embodiment
Referring to Fig. 1, Fig. 4, on the glass tube 6 front end peripheries ring groove is arranged in the utility model, establish O type rubber ring 4 in the groove, the interior step of locking cap 5 is pressed on the rubber ring, can not come off, locking cap 5, adapter sleeve 3, joint 2 are connected delivery line 1 jointly with the glass tube forward end seal; The end face of piston 7 is the smooth surface that the center is higher than periphery, difference in height Δ h=0.8mm, and piston is made by teflon, and there are 3 road bulge loops 8 side, and this bulge loop and the glass tube inwall magnitude of interference are 0.05mm.
Claims (4)
1, a kind of titration apparatus sampling injector, comprise glass tube, piston, delivery line and joint, adapter sleeve, pin cap, it is characterized in that on the described glass tube front end periphery ring groove being arranged, establish rubber ring in the ring groove, and this rubber ring is in locking cap between step surface and the adapter sleeve end face, described piston end surface is the smooth surface that the center is higher than periphery, and there are 2～4 road bulge loops the piston side, this bulge loop and glass tube inwall interference fit.
2, by the described titration apparatus sampling injector of claim 1, it is characterized in that described ring groove cross section is a U-shaped, establish O type rubber ring in the groove.
3,, it is characterized in that described piston end surface culminating point is than the high 0.5～1.0mm of periphery by the described titration apparatus sampling injector of claim 1.
4, by the described titration apparatus sampling injector of claim 1, it is characterized in that described piston material is a teflon, its side bulge loop and the glass tube inwall magnitude of interference are 0.04～0.08mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520077911 CN2854598Y (en) | 2005-11-24 | 2005-11-24 | Sample injection syringe of titration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520077911 CN2854598Y (en) | 2005-11-24 | 2005-11-24 | Sample injection syringe of titration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2854598Y true CN2854598Y (en) | 2007-01-03 |
Family
ID=37581235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520077911 Expired - Fee Related CN2854598Y (en) | 2005-11-24 | 2005-11-24 | Sample injection syringe of titration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2854598Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482539A (en) * | 2008-01-10 | 2009-07-15 | 江苏江分电分析仪器有限公司 | Sample injection syringe of titration apparatus |
| CN103926374A (en) * | 2014-03-30 | 2014-07-16 | 吉首大学 | Novel general burette |
-
2005
- 2005-11-24 CN CN 200520077911 patent/CN2854598Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482539A (en) * | 2008-01-10 | 2009-07-15 | 江苏江分电分析仪器有限公司 | Sample injection syringe of titration apparatus |
| CN103926374A (en) * | 2014-03-30 | 2014-07-16 | 吉首大学 | Novel general burette |
| CN103926374B (en) * | 2014-03-30 | 2015-09-16 | 吉首大学 | Novel universal buret |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |